Combination valve



June 19, 1928. 1,673,811

H. DOWIE COMBINATION VALVE Filed F91 1, 1927 2 Sheets-Sheet 1 IN V EN TOR.

AT'TORN Y.

June 19, 1928.

H DOW I E COMB INAT I 0N VALVE Filed Feb. 1, 1927 2 Sheets-Sheet 2 INVENTOR. MM. a ng ATTORNEY.

Patented June 19, 1928.

UNITED STATES HORACE nowIE, or BROOKLYN, NEW YORK.

COMBINATION VALVE.

Application filed February '1, 1927. Serial 1%. 165,101.

This invention relates to devices for con trolling the flow ofliquids through a pipe hen of the three units, namelyg a' shut-01f valve, a strainer and a siphon check or seal line and particularly to the control offuel oil in an oil burner installation;

In the installation of an oil burner system, provision must be made for shutting oflf the supply of fuel at will, for strainingthe fuel and for preventing siphoning actionshould the burner be positioned at a lower level than the fuel level in the tank and a leak should occur in the supply line, that is, a seal must be provided. 1

Various methods of accomplishing these three desired results as by the use of;sepa-' rate valves, stralners and seals, the use of enlarged'stand pipes and other devices have been tried.

The present invention proposes to accomplish the desired results'or'the combination ot any two of them where only two are desired by the use of a combination valve comprising a valve, strainer and seal or any two of these all housed in asingle cas ng. Use is made of a valve having its connection intervalof standard distance so that the'completed device may be substituted; for the standardvalves now in use in oil burnenin stallations. In carrying out this-invention,

the structure of a standard Valve is utilized but the flow of fuel therethrough s deflected through a chamber attached-to a valve of otherwise standard structure andpropor tions wherein the fuel is passed through a.

seal and a strainer, both beingunder control of the valve.

The detail structure and its application will be set forth more clearly in the accompanying drawings, in which Fig. 1 is a diagrammatic sketch of an o1l burner installation using a single supply line in which this invention is embodied;

Fig. 2 is a diagrammatic-sketch of'an oil burner installation employing a supply and return line and in which this invention 1s embodied;

Fig. 3 is a vertical section of the combined valve, strainer and seal; I p a Fig. t'is a'vertical section of a combmed valve and strainer; v

Fig. 5 is a vertical section of a modified form of a combined valve and strainer, and Fig. 6 is a vertical section of a combined valve and seal.

In Fig. 1, it is seen that combination fwhi'ch are ordinarily use 1 valve'i of this invention is inserted in the supply line 2 from tank 3 toa' burner in In Fig. 2, the valve 1 is shown inserted in the supply the return line being indicated by 3.

Referring more-particularly to Fig. 3, it

is" seen that the combination valve consists of a casing or body 5 divided into inlet and outlet passages 6 and 7, respec tively, by'a partition 8 -extending transversely of the casing. The'two outer ends of the casing are internally threaded as at 9 and 10 to permit of the usual pipe connections. Partiline 2 of a two pipe installation,

tion' 8 has an aperture or port therethrough to which is fitted a valve seat 11. The top of the casing or body has an opening there-' a through to which the valve bonnet 12 is se-' cured by means of a nut 13, through which a valve stem 14 extends, carrying upon its inner end a valveface 15 adapted to seat upon the valve seat 11 to close" the port through the partition. "The customary packing nut 16 is threaded tothe upper end of the bonnet to, prevent leakage along the valve stem. The parts thus far described constitute the usual elements of a standard valve and have relativelythefsame propor tions as a standard valve so that a combination valveof a 'given pipe size may be substituted in place for a standard valve ofsirnilar pipe size. a

The casing '55 isalso formed with an opening atthe bottomfthereof, somewhat similar to the oneat the top to which the bonnet, is secured and to which a long closed tubular chamber 17 is fastened as'by threaded en- 'gagement. V "bottom thereof for the purpose of tightening :the chamber upon the casing andmay be A nut 18 is provided'on the tapped to receive a pet-cock 18 for purposes of draining the chamber or otherwise' giving access thereto. P V

A slender tube or conduit 19 extends into chamber 17 to substantially the bottom thereof and communicates at its, upper ,end With the opening in the 'valve seat. 11 to which it may be secured. A tube 20, somewhat larger in diameter than conduit 19 and closed atits lower end, surrounds'conduit'19, and is secured [to the partition 8 at' its upper end as by threaded "engagement 7 for immediate start-ing purposes inasmuch.

to the seat 11 or some other convenient means. A plurality of apertures 21 are formed through the walls of tube 20 near the vupper end thereof giving access from the tube into the chamber 17. Surrounding the tube 20 and extending above apertures 21 is a tubular screen 22 closed at its bottom and open at its top only suificiently to permit it to be slid over tube 20. The strainer rests upon the bottom of the chamber and is thereby held in place but if found desirable the strainer may be supported from the valve casing in any desiredmanner.

Mercury or other suitable fluid 23 is placed in the tube 20 in sufficient quantity,

inaccordance with the depth of the tank, to

withstand the back suction of the oil when- 1 ever the flow ceases in the line so that the mercury will merely rise in conduit '19 and hold the seal and also prevent anysiphoning action in event of a leak in the piping between the valve and theburner.

In Fig- 4:, a slight modification is shown wherein the tube '20 is omitted and the strainer 22 has a ferrule 25 upon its upper end which is threaded to the valve seat. This modification is particularly adaptable where it isnot desired to have a seal in combination with a valve and strainerbut merely a valve and strainer and yet where it is desirable to feed the fuel or other liquid to thebottom of the chamber 17 In Fig. 5,- another and; still simpler combined valve and strainer is shown wherein the design is similar to that shown in 'Fig. 4 eXcept that the conduit 19 vis omitted.

In Fig. 6, a combination valve and mercury seal is provided and where this combi nation alone is desired the strainer, and tube both may be omitted.

It is to be'noted that vides asmall reservoir or supply of fuel as the mercury will not .permit its'bei'ng drawn back into the tank. The mercury will also hold the supply line, up to. the valve, full of oil thus in itself acting as a check valve, and eliminating the necessity of other checks or other devices to accomplish this purpose. I p r It is apparent that minor changes may be made in the details of the structure and that a-special-valvecasing may be made.

which departs from standard dimensions without departing from the spirit and scope of the invention as defined in the appended claims. s V

I claim: s p a 1. A combination valve and anti-siphoning device comprisinga unitary structure including avalve casing having separated inlet and outlet passages, a chamber extending from saidcasing having communicationwith one of said passages, means for checking the flow through said chamber a the chamber 1'1 pro conduit extending into said chamber and ber extending from, said third opening, a.

conduit extending into said chamber and opening into said inlet passage, and a valve for closing thelpassage means for checking the flow through said chamber mto sa d conduit. i

3'. A combination valve and antifsiphoning device comprising a unitary structure includinga valve casing. havingfirilet and outlet passages, a partition separatingsaid passages,-a port in saidpartition, a chamber extending from said casing opening into one. of said passages, vmeans within said chamber for automaticallyinterrupting flow therethrough upon predetermined conditions, and a valve for closing said port.

4i. A combination valve andv anti-siphon j ing device comprising a unitary structure including a valve casing having nlet and outlet passages, a partition separating said assa es i a aort in 'saidartition a valve seat in said port, a closed chamber extendlng from, said casing and communlcatmg with one of saidpassages, means within said chamber for automatically interrupting the flow therethrough,'a conduit eXt-endinginto said chamber and communicating with said valve seat, and a valve for closing said valve seat.-

V a A combination valve and strainer com risin a valve casin havine inlet and out b b D letpassages, a partition in said casing sepa-. rating .said passages, a port through said 1 closed removable chamber supported from sald casmg havmg communication with one of said passages, a strainer supported from said partition extending intosaid chamber and having'communication with the other otsaid passages and means within said chamber for automatically interrupting flow therethrough upon predetermined conditions. I

6. In a combinationvalve, strainer and.

partition, a valve for closing said port, a.

cation therethrough, a chamber supported by and extending from said casing having communication with one of said passages and having means therein for automatically interrupting the flow therethrough upon predetermined conditions, a conduit extending into said chamber and establishing communicationbetweensaid chamber and the rounding said conduit.

7. In a combination valve, strainer-1 and anti-siphoning device, a valve casingdivided into inlet and outlet: passages' by a'partition,

a port through said partition, a valve controlling said port, a chamber extending.

from said casing, a conduit extending into said chamber and communicating with said port, a tube closed at the bottom surrounding said conduit forming a well, a strainer surrounding ,said closed tube interrupting communication between said port and said passage,

8. In a combination valve, strainer and anti-siphoning device, a valve casing, having a partition therein dividing said casing into inlet and outlet passages, a port in said partition, a valve controlling said port, a removable chamber secured to said casing, having communication with one of said passages, a conduit extending from said port into said casing, a tube closed at one end forming a well and having openings communicating with said chamber surrounding said conduit and a strainer positioned between said chamber and the passage to which it communicates.

9. In a combination valve, strainer and anti-siphoning device, a valve casing, having a partition therein dividing said casing into inlet and outlet passages, a port in said partition, a valve controlling said port, a removable chamber secured to said casing, having communication with one of said passages, a conduit extending from said port into said casing, a tube closed at one end and having openings communicating with said chamber surrounding said conduit, and a strainer within said chamber intercepting fiow between said two passages.

10. In a combination valve, strainer and anti-siphoning device, a valve casing, having a partition therein dividing said casing into inlet and outlet passages, a port in said partition, a valve controllin said port, a removable chamber secured, to said casing, having communication with one of said passages, a conduit secured to said partition extending from said port into said casing, a tube closed at one end and communicating with said chamber at its other end surrounding said conduit, and a strainer within said chamber intercepting flow between said two passages.

11. In a combination valve, strainer and anti-siphoning device, a valve casing, a partition therein dividing said casing into inlet and outlet passages, a port through said partition, a valve controlling flow through said port, a removable chamber secured to said casing and extending therefrom, a conduit extending into said chamber having one end secured to said partition in communication with said port,;atube surrounding-said con-" duit closed at one end and having openings .at 'the other communicatingwithsaid chamber supported from said partition, and a strainer within said chamber surrounding said. tube and interposed between said openings and said chamber 12. In a liquid fuel supply system, a fuel supply pipe leading to a burner, a combination valve in said supply pipe comprising a valve casing and a valve therein,a chamber extending from said casing containing a strainer and anti-siphoning means therein cooperatively associated with said valve.

13. A combination valve comprising a valve casing, a valve therein, a chamber extending from said casing, a mercury seal and a strainer within said chamber adapted to intercept the flow through said valve casing.

14. A combination valve and anti-siphoning device comprising a valve casing having separated inlet and outlet passages, means therein for checking the flow through said passages upon predetermined conditions, and additional valve means for controlling communication from said inlet to said outlet. a v

15. A combination valve and anti-siphoning device comprising a valve casing having separated inlet and outlet passages, a chamber extending from said casing, having checking means therein adapted to automatically control the flow through said inlet and said outlet passages upon predetermined conditions, and valve means for controlling communication from said inlet and said outlet. i l

16. A combination valve and anti-siphoning device comprising a valve casing having inlet and outlet passages, a partition separating said passages,aport in said partition, a valve seat in said port, a chamber extendin from said casing, and communicating with one of said passages, an antisiphoning and checking means within said chamber and communicating with said port, and a valve cooperating with said seat for closing said port.

17 In a combination valve, strainer and anti-siphoning device, a valve casing having a partition therein dividing said casing into inlet and outlet passages, a port through said partition, a valve controlling communication therethrough, a chamber extending from said casing and having communication with one of said passages, a checking device in said casing for automatically controlling the flow through said inlet and outlet passages upon predetermined conditions, and a strainer intercepting the flow between said inlet and outlet passages.

18; In a fluid transfer system a fluid transfer pipe, a combination valve in said pipe, comprising a valve casing and a valve 20. A combination valve comprising a valve casing, a valve therein, a; chamber extending from said casing, a: combined seal and checking device, and wstrainer within said chamber adapted to intercept the'fiow throughsaid valvecasing.

In Witness whereof, I hereunto-eubscriloe my signature.

HORACE DOWIE. 

